we were so excited to be here, to the marathon to see our son run, and it -- it's -- it's a war zone. >> no matter who is responsible the act of terror at boston

marathon was meant to inflict serious damage but also, as any act of terrorer it's not how many it's about whether it can succeed in striking fear into hearts of many causing them not to congreat, not to live their lives in the free american way. psychologist jeff gardere joins me pap we don't know anything, whether they're american, foreign, we don't know what they were inspired or motivated by. but there's a lot you do know. >> that's right. a common thread, whether international terrorist, domestic terrorist, someone with psychological issues they do want to strike terror but more than anything else, disrupt the lives of everyone else. and they're trying to make a statement and that statement is based on rage, it's based on anger, and they want to know the world, they want the world to know that they're making the statement and they want to be heard, even though no one is taking credit as yet. >> right. and is that in and of itself,

does that say something to you, this person has not said, hey, it's me? >> yeah. what it tells me, from a psy psychological point of view someone who wants to someone to be uncomfortable. this is part of the terror. no one has come forward. we're used to that pattern and people are still off, they don't know what to think, and in some way that's where they have power over the rest of us. >> what about the rest of us? what about the people who were there? or the people who weren't there who may be afraid? >> the most important thing for them to know is, it's okay to be afraid but don't sit on that fear. talk to other people about it. acknowledge it, but try to live your life as best as you can, because then you thwart the goal of that terrorist, and we know that if you let that fear take over, it becomes a phobia and then our lives are completely at that point side tracked or destroyed. >> that would be victory. >> live your life. >> all right.

jeff, thank you very much. live your life. the chilling scene played over and over again. none of us, none of you watch, none of us, no one will ever forget the moment of the first blast where smoke was everywhere and one man running near the finish line was knocked off his feet that slow motion you have seen so many times. you know what? he got up and finished the race. and he talked. he's 78 years old. he's next. okay, team! after age 40, we can start losing muscle -- 8% every 10 years. wow. wow. but you can help fight muscle loss with exercise and ensure muscle health. i've got revigor. what's revigor? to help rebuild muscle and strength naturally lost over time. [ female announcer ] ensure muscle health has revigor and protein to help protect, preserve, and promote muscle health. keeps you from getting soft. [ major nutrition ] ensure. nutrition in charge!

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i'm chris cuomo here in boston. continuing our coverage of the attacks at the boston marathon. sometimes there are moments that become meaningful in situations like there is. certainly, the one we're about to show you is something you've seen and is so instructive of the symbolism of this event. the explosion goes off, old man seems to get hit by blast that knocks him off of his feet. it became a moment not because bill iffrig, 78, fell down but because of what happened when he got up and what he decided to do and what he decided to say. he spoke to our piers morgan. take a listen. >> well, i was just approaching the last straightaway to the finish line and i had a good day and i'm feeling really good and

i got down within about 15 feet of the finishing apron and this tremendous explosion, sound like a bomb, went off right next to me and shockwaves hit my whole body and my legs just started jittering around. i knew i was going down. and i ended up down on the blacktop and i didn't feel any severe pain but as i rolled over, i seen a little scratch on my leg. but nothing too bad. so i laid there just momentarily and one of the finishers finishers, assistants come over and talked to me and asked me if there was anything they could do, and offered to get me a hand, help me get up and helped me get over the finish line. so i completed my race. so we did that, and i felt okay. so i told them i was probably all right. he insisted on getting a wheelchair over there. so we started to do that, but then before they had one rounded up, i said, hey, i'm only -- my

hotel is six blocks away. i think i can make it okay. so they let me get out of there and i went on home to my wife. >> certainly sport here transcended, became just about the human spirit, about the attacks. and mr. iffrig really personalizes that and personifies it. you know who else thinks so? "sports illustrated," their cover this week is bill iffrig. the headline is obvious. boston, and their magazine is about sporting and sporting life but he means so much for him to get up and finish the race and speak with confidence about living his life as the interview you just had said, that's what it is all about, right? >> it is what it is all about. right after that interview finished, he said we have to be like that man, you have to get up and finish the race, which i thought was a poignant way to talk about this. chris, of course, as you know, investigators are spending 100% of their efforts now to find the

person or people because we still don't know if it was single or multiple behind the bombing. they're trying to look at personal photos and video. there is so much from that from regular people there at the finish line. coming up, what you can do to help. whatever business you're in, that's the business we're in. with premium service like one of the best on-time delivery records and a low claims ratio, we do whatever it takes to make your business our business. od. helping the world keep promises. how old is the oldest person you've known? we gave people a sticker and had them show us. we learned a lot of us have known someone who's lived well into their 90s. and that's a great thing. but even though we're living longer, one thing that hasn't changed: the official retirement age.

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chris cuomo in boston with the latest of cnn's team coverage of the attacks at the boston marathon. law enforcement this morning very clear that the early stages of their investigation asking anybody to come forward with video or pictures if they have it themselves or know someone else who may have it to help fuel this investigation. so, our tom foreman did a story of what truth may be hidden in these photos. >> reporter: while public attention focused largely on images of the twin explosions and their aftermath, investigators are more interested in this, the pictures of what happened before the blast. >> i think we're processing all the digital photographic evidence we possibly can right now as quickly as possible with resources from fbi headquarters, quantico and that's a priority of the investigation right now. >> reporter: law enforcement official tells cnn so far investigators have found no surveillance video of anyone planting either bomb. but it is early, investigators are still combing local businesses to collect all

security camera videos for blocks around, and asking people along the route to hand over any and all digital images. >> it is our intention to go through every frame of every video that we have to determine exactly who was in the area. this is probably one of most well photographed areas in the country yesterday. >> reporter: visitors to the city are also being asked to offer up their images from the event before they leave town. >> there is a lot of questions going on amtrak and now at logan. people leaving, because everyone was there taking pictures you may have seen someone. >> reporter: before it is all done, investigators could wind up with tens or hundreds of thousands of still pictures and many, many hours of video. but the painstaking analysis of all those images is anchored on one hope that somewhere in all of that right now is a picture of the person or persons who planted the bombs. tom foreman, cnn, washington. >> that's the hope for investigators.

our thanks to tom foreman. they'll get some media, they'll find something that will lead to who did this and why. a lot of unanswered questions. i can't do a lot of reporting when i'm on tvgs. i'm going to get back out there and see what we can figure out, come back on later with it. over to you now, erin. >> thank you, chris. that's the thing. got to go out and find that nvgs. as news has come in about yesterday's horrific bombing, many turns to social media to show their support for the victims. wearing race t-shirt, simple words of kindness, social media was where the nation and the world came together. [ male announcer ] does your prescription medication give you the burden of constipation?

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want to show you the reaction that you all had and that's the reaction you saw on social media. people have been using it as a place to express their emotions about what happened yesterday d